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Flexible organic light-emitting device, preparation method thereof and display device

An organic light-emitting device, flexible technology, applied in the direction of organic semiconductor devices, semiconductor/solid-state device manufacturing, electric solid-state devices, etc., can solve the problems of reducing device efficiency, difficulty in light extraction, etc., to eliminate total reflection, increase light extraction rate, improve The effect of efficiency

Active Publication Date: 2021-06-25
JILIN OPTICAL & ELECTRONICS MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the current thin-film packaging method uses SiN material with low refractive index, the OLED optical path has a certain degree of total reflection at the interface between the light extraction layer and the thin-film packaging, which makes it difficult to extract light and ultimately reduces the efficiency of the device.

Method used

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  • Flexible organic light-emitting device, preparation method thereof and display device
  • Flexible organic light-emitting device, preparation method thereof and display device
  • Flexible organic light-emitting device, preparation method thereof and display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] as attached figure 1 As shown, this embodiment provides a flexible organic light-emitting device, and its specific preparation method includes the following steps:

[0051] S1. Use transparent glass with ITO on the surface as the substrate, then ultrasonically clean it with deionized water, acetone, and ethanol for 15 minutes, and then treat it in a plasma cleaner for 2 minutes to obtain the first electrode 1 .

[0052] S2 , on the washed first electrode 1 , prepare a hole injection material HIL1 by vacuum evaporation, with a thickness of 10 nm, as the hole injection layer 2 .

[0053] S3. On the hole injection layer 2, a hole transport material HTL1 is prepared by vacuum evaporation, with a thickness of 125 nm, as the hole transport layer 3 .

[0054] S4. On the hole transport layer 3, an electron blocking material EBL1 is prepared by vacuum evaporation with a thickness of 5 nm as the electron blocking layer 4.

[0055] S5. On the electron blocking layer 4, the host ...

Embodiment 2

[0061] as attached figure 1 As shown, this embodiment provides a flexible organic light-emitting device, and its specific preparation method includes the following steps:

[0062] S1. Use transparent glass with ITO on the surface as the substrate, then ultrasonically clean it with deionized water, acetone, and ethanol for 15 minutes, and then treat it in a plasma cleaner for 2 minutes to obtain the first electrode 1 .

[0063] S2 , on the washed first electrode 1 , prepare a hole injection material HIL1 by vacuum evaporation, with a thickness of 10 nm, as the hole injection layer 2 .

[0064] S3. On the hole injection layer 2, a hole transport material HTL1 is prepared by vacuum evaporation, with a thickness of 125 nm, as the hole transport layer 3 .

[0065] S4. On the hole transport layer 3, an electron blocking material EBL1 is prepared by vacuum evaporation with a thickness of 5 nm as the electron blocking layer 4.

[0066] S5. On the electron blocking layer 4, the host ...

Embodiment 3

[0072] as attached figure 1 As shown, this embodiment provides a flexible organic light-emitting device, and its specific preparation method includes the following steps:

[0073] S1. Use transparent glass with ITO on the surface as the substrate, then ultrasonically clean it with deionized water, acetone, and ethanol for 15 minutes, and then treat it in a plasma cleaner for 2 minutes to obtain the first electrode 1 .

[0074] S2 , on the washed first electrode 1 , prepare a hole injection material HIL1 by vacuum evaporation, with a thickness of 10 nm, as the hole injection layer 2 .

[0075] S3. On the hole injection layer 2, a hole transport material HTL1 is prepared by vacuum evaporation, with a thickness of 125 nm, as the hole transport layer 3 .

[0076] S4. On the hole transport layer 3, an electron blocking material EBL1 is prepared by vacuum evaporation with a thickness of 5 nm as the electron blocking layer 4.

[0077] S5. On the electron blocking layer 4, the host ...

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Abstract

The invention discloses a flexible organic light-emitting device, a preparation method thereof and a display device, and belongs to the technical field of electronic display. The flexible organic light-emitting device sequentially comprises a first electrode, a hole transport region, a light-emitting layer, an electron transport region and a second electrode, wherein a first light extraction layer and a second light extraction layer are sequentially arranged on the side, which is away from the electron transport region, of the second electrode; the first light extraction layer comprises a first light extraction material; the second light extraction layer comprises a second light extraction material; and a refractive index of the first light extraction material is greater than a refractive index of the second light extraction material. According to the invention, the problem that light is difficult to extract due to the fact that a light path of the flexible organic light-emitting device has a certain total reflection phenomenon on a light extraction layer and a thin film packaging interface can be well solved by adopting the light extraction layer material with the high refractive index and the low refractive index matched, and then the efficiency of the flexible organic light-emitting device is improved.

Description

technical field [0001] The invention relates to the technical field of electronic display, in particular to a flexible organic light-emitting device, a preparation method thereof, and a display device. Background technique [0002] Organic electroluminescence (EL) refers to a luminescence phenomenon in which organic materials directly convert electrical energy into light energy under the action of an electric field. It has the characteristics of self-illumination, bright colors, thin thickness, light weight, fast response speed, wide viewing angle, low driving voltage, tolerance to harsh natural conditions, and can be made into flexible panels. Advantage technology. [0003] The emergence of flexible OLED devices determines that the current OLED packaging method will change from hard screen packaging to flexible thin film packaging (TFE, Thin Film Encapsulation). Traditional OLED devices use a single-layer and high refractive index light extraction layer (CPL, Capping Layer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/52H01L51/54H01L51/50H01L51/56H01L27/32
CPCH10K59/10H10K85/656H10K85/6565H10K85/636H10K85/626H10K85/633H10K85/631H10K85/615H10K85/654H10K85/6576H10K85/6574H10K85/6572H10K85/657H10K50/18H10K50/15H10K50/16H10K50/17H10K50/858H10K2102/311H10K71/00
Inventor 邱镇马晓宇王铁李天佑刘长伟王伟哲杨勇
Owner JILIN OPTICAL & ELECTRONICS MATERIALS
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